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ADJUSTABLE GLAMP. No. 257,939. Patented May 16,1882.

'HlllllllllllllAllL WITNESSES INVENTOR WWU/Wmv. v

` UNITED STATES PATENT OFFICE.

CHARLES GOVE, OF NORWALK, OHIO, ASSIGNOR OF ONE-HALF TO CHARLES E. GOVE, OF SAME PLAGE.

ADJUSTABLE eLAM P.

SPECIFICATION forming part of Letters Patent No. 257,939, dated May 16, .1882,

Application filed November 14, 1881. (Model.)

To all whom it may concern Be it known that I, CHARLES H. GovE, ot' Norwalk, in the county of Huron and State of Ohio, have invented certain new and useful Improvements in Adjustable Clamps; and l do hereby declare the following tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

.My invention relates to an improvement in adjustable clamps, the object of the same beingzto providel a clamp of small initial cost capable of being extended or contracted, so as to enable one clamp to be used on dierent size flasks, thereby dispensing with the rigid clamps ordinarily employed ,and with these ends in view my invention consistsin certain details in construct-ion and combinations of parts, as will be more fully er"`plained, and pointed out in the claims.

In the accompanying drawings, Figure lis a perspective view, representing my improvement. Fig. 2 is a plan view ot' the same.

Fig. 3 is a side view ofthe opposing faces of.

the arms. Fig. et is a transverse sectional View of the clamp, showing the manner of securing the lever and cam in position; and Fig. 5 is a detached view ofthe lever.

A represents the stationary arm, having the iaw a on one end thereof, and provided with the housing or boxing B on the opposite end, by means of which the sliding-arm is held in contact with the stationary arm A., This housing or box-ing B is closed at the bottom and sides and open at both ends and partly open on top, the openings at the ends being sufliciently large to admit the sliding` arm, while the opening on top is adapted for the introduction of the disk O, and also for the movement of the lever controlling the locking-cam. In the body ot the stationary arm A, and formed integral therewth,' is the circular recess or seat D, adapted for the reception of the circular disk C, t0 which the cam E and lever F are secured, this recess or seat I) being of the same size as the said disk, and when the latter is secured in position the outer face thereof rests flush with the side of the stationary arm A.

which allows the said sliding arm to be moved freely therein',while the bridge b forms the limit of backward movement, and when the lever is resting thereon the sliding arm is securely locked in position. This lever F can be formed integral with the disk and cani E, or the said parts can be made separate pieces and rigidly secured together in the manner shown. The lever is purposely curved to form a suitable handle, whereby it may be carried conveniently from place to place and handled withoutinconvenience. The cam E is shaped as shown, and is situated to one side of the center of the disk, and is'ot' such size that the end c thereof rests on a level with the under side of the bridges b and b when the lever j rests on the bridge b. When the sliding arm is introduced within the outer end ofthe housing all that portion of the disk O below the cam E is covered by the sliding arm G,which `holds the said disk, cam, and lever in posi-` tion, but allows them to be turned freely without interference.-

rlhe sliding arm G is provided with thejaw a atoneend thereof, and with the teeth H, with which the cam E engages. These teeth are formed integral with the arm G, and are shaped substantially as shown in the drawings, the front or concave portions thereof forming the bearings of the convex side of the cam E, while the indented portion x of the back is adapted for the reception of the endo of the cam E. When the cam E is moved down so as to rest between t-he teeth H it lies below the center of the disk, and all pressure tendingto separate thejaws a c only serves to movethe cam lower, which consequently holds theparts more secure and prevents them from becoming accidentally unlocked after they have been applied to a ilask, &c.

IOv

To secure a flask by this clamp it is only necessary to move the; sliding jaw until it rests on the edgeof the ilask, when the lever is thrown backward, which engages the cam with the concave or front face of a tooth, and by forcing thelever backward the slidinga-rm is moved. inward, which increases the space between the jaws a and a', andconsequently holds the parts of the flask securely together.

I have described this clamp in connection with a Bash, but itis equally well adaptedfor the use ofjoiners, carpenters, pattern-makers, or any one using clamps for gluing or holding their work together, as well as for foundry use.

These clamps can be made of cast metal, and can be taken from the sand and put together for immediate use without any finishing whatever; or they can be made of any suitable material and size to suit the work.

The advantages of this style of clamp over the old rigid clamp are numerous, as its wide rangejof adjustability allows three -or four clamps oi' different sizes to supersede the h undreds ofrigid clamps employed in foundries.

Insteadof'using the housing shown in the drawings, anysuitable number ofloops or arms can'be used for the salme'purpose; and instead otl closing-the sides and bottom, they may be left open and vanswer all the necessary purposes, it only being necessary to provide suitable means for holding the two arms together.

It is evident that slight changes in the yconstruction and arrangement of the different parts of ymy improvement might be resorted to without departing from the spirit ot' my invention, and hence I would have it understood that-I do not limit myself to the exact con-` struction of parts shown and described, but consider myselt'at liberty to make such changes as come within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters 1. The'combination, with the stationary arm having a recess or seat' formed therein, and a movable arm having teeth on one side and adapted to be loosely secured to the said stationary arm by any suitable means, of the disk having the lever and cam secured thereto and adapted to rest in the seat or recess in the stationary arm and be held therein against dis# placement by the removable arm, substantially as set forth.

2. The combination, withthe stationary arm provided with means for loosely holding the movable arm, and with a recess or seatyand a-slidin g arm having teeth thereon, the'- latter being shaped substantially as described, of'a disk having a cam and lever rigidly secured thereto, the said disk adapted to itiu said recess or seat and be partly rotated therein, so as to enable the cam to v be moved betweenk the said teeth, substantially as set forth.'

3. The combination,-withthe arm A, provided with thezjaw a, recess or 'seat D,"and housing B, andthe. movable armiGr,'providedwith the jaw a and teeth H, ofthe diskC, adapted to loosely tin the said recess D,and provided with the cam E'and lever F, substan-n tially as set forth.

In testimony whereof I have signed this speciication in the presence of two subscribing-avitnesses. A CHARLES H. GOVE- Witnesses:

O. E. KELLOGG, Y T. R. STRONG. 

